#!/usr/bin python3
# -*- coding:UTF-8 -*-
# Author: nigo
import pandas as pd

df1 = pd.DataFrame([['a', 1], ['b', 2]], columns=['letter', 'number'])
df2 = pd.DataFrame([['bird', 'polly', 'a'], ['monkey', 'george', 'c']],
                   columns=['animal', 'name', 'letter'])

df = df1.append(df2)
print(df1)
print(df2)
print(df)
